PicPlz, which is lead by former Imeem music community head Dalton Caldwell and funded by leading VCs Andreessen Horowitz (who bailed from Instagram to invest in PicPlz instead), just announced the following: public availability of its Application Programming Interface for other apps to use its filters and widgets, support for users to publish photos under Creative Commons licenses and new analytics dashboards for brand advertisers using the service. The simplicity of Instagram just got challenged in a big way.